ABB 2CDS253001R0105 S203-B10 3P 10A 6kA B-Curve 230/400V AC DIN-Rail Miniature Circuit Breaker

The ABB S203-B10 miniature circuit breaker (MCB), catalog number S203-B10 / SKU 2CDS253001R0105, is a 3-pole, 10A, B-curve device rated at 230/400V AC with a 6kA breaking capacity, designed for reliable overcurrent and short-circuit protection in industrial control panels, commercial installations, and distribution boards. Part of ABB's proven S200 series, the S203-B10 mounts on standard DIN rail and offers a compact footprint of 52.5mm × 88mm × 69mm.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1: Standard for circuit breakers for overcurrent protection for household and similar installations
• IEC/EN 60947-2: Low-voltage switchgear and controlgear — circuit breakers
• UL 1077: Supplementary protectors for use in electrical equipment
• IEC 60898-1: International standard for household and similar miniature circuit breakers
• EN 60898-1: European harmonised standard for miniature circuit breakers
• IEC 60898-1400: Extended application of IEC 60898-1
• IEC 60947-2440: Extended application of IEC 60947-2
• IEC 60068-2: Environmental testing standard
• EN 60947-2: European standard for low-voltage circuit breakers
• EN 45555: General methods for the assessment of the ability of energy-related products to be repaired, reused, and recycled
• EN 60664: Insulation coordination for equipment within low-voltage supply systems
• CSA: Canadian Standards Association certification
• RoHS: Restriction of Hazardous Substances — compliant with EU Directive 2011/65/EU
• REACH: Compliant with EU REACH regulation (EC) No 1907/2006
• WEEE: Waste Electrical and Electronic Equipment Directive compliance
• CE: Conforms to applicable EU directives for the European market
• UKCA: UK Conformity Assessed marking for Great Britain market

Applications & Use Cases

• Overcurrent and short-circuit protection in 3-phase distribution boards
• Industrial control panels and automation enclosures
• Commercial and light industrial electrical installations
• Motor feeder protection where B-curve (3–5×In) trip characteristic is appropriate
• Building services and HVAC control panel protection